JP2015521071A5 - - Google Patents

Claims (17)

Even without least using photoplethysmography system comprising one light source and at least one photodetector, a method for the continuous non-invasive measurement of blood pressure,
Placing at least one light source and at least one photodetector on a body part including an artery;
Method comprising the bringing the contact pressure of the photoplethysmography system, varies depending on the mean blood pressure. The method of claim 1, wherein a contact pressure of the photoplethysmography system is adapted to the mean blood pressure. The method according to claim 1 or 2 , wherein the rate of change of contact pressure of the photoplethysmography system is slower than the rate of change of pulsating blood pressure in the artery. The initial contact pressure (p ₀ ) of the photoplethysmography system is measured during the search phase, at which the initial photoplethysmography signal (v ₀ ) rises with maximum amplitude. The method in any one of -3 . In the search stage, the initial contact pressure (p _0), the initial photoplethysmography signal with the maximum amplitude (v ₀₎ and that is measured, and the initial set point (v 0 _{/ p 0)} is measured 5. The method of claim 4 , wherein the method is stored therefrom. Contact pressure p (t) of the photoplethysmography system A method according to any one of claims 1 to 5, by the control system, characterized in that it is remotely controlled from the initial contact pressure. Wherein the control system generates a filtered photoplethysmography signal _{(v LF (t)),} the signal is, in claim 6, characterized in that it is compared to the initial photoplethysmography signal (v ₀₎ The method described. The control system, by passing the photoplethysmography signal to a low pass filter, The method of claim 6 or 7, characterized in that to consider the physiological changes in the arterial vessel wall. 9. The method of claim 8 , wherein the control system recognizes physiological changes in the arterial vessel wall by comparing pulsating signal components of the photoplethysmography signal. Off O DOO plethysmometer blood pressure signals derived from graphic measurement method according to any one of claims 1 to 9, characterized in that it is thus calibrated intermittently blood pressure monitoring. And mean blood pressure of intermittent manner the upper arm measurement, the contact pressure of the photoplethysmography system, optionally, the pulsation photoplethysmography signal components, according to claim 10, characterized in that for use in calibration of the pressure signal the method of.   The method according to claim 1, wherein the contact pressure is obtained from a control variable used for pressure tracking. An apparatus for continuous non-invasive measurement of blood pressure using photoplethysmography system,
At least one light source,
At least one photodetector for generating a photoplethysmography signal,
At least one light source us and at least one photodetector, and a mounting element for attachment to the body part content including arteries,
Bei to give a,
Apparatus characterized by the contact pressure of the mounting element against the body part component, the equipment can be changed depending on the mean blood pressure is provided. 14. The apparatus of claim 13, wherein the at least one light source is an LED and the at least one photodetector is a photodiode. Equipment for changing the contact pressure is configured to achieve a rate of change of the contact pressure of photoplethysmography system, its speed, than the speed of the pulsation pressure variation in the arteries of the body portion minutes 15. Device according to claim 13 or 14 , characterized in that it is slow. The equipment for changing the contact pressure, machine械的Apparatus according to any one of claims 13 to 15, characterized in that it comprises an electromagnetic or electric motor specific actuator. For the equipment for varying the contact pressure, the first filter (TP _LF) signal pulsating pressure variation is eliminated by using the _{(v LF (t)),} and a second filter (TP the vasomotor changes using _VLF) is derived from the signals being eliminated _{(v VLF (t))} is photoplethysmography system of photoplethysmography signal (v (t)), it is assigned a control system The device according to any one of claims 13 to 16 , characterized in that